The Bronx

A woman brutally beat her girlfriend with an iron during a domestic fight inside a Mott Haven apartment, authorities said.

Aslee Sampson, 31, struck her partner numerous times in the face with the iron before ripping off her earrings and scratching her chest during the altercation in their Beekman Avenue apartment at around 12:35 a.m. Nov. 16, according to a Criminal Court complaint.

The victim suffered lacerations and bruising and lost consciousness.

Sampson then threw her girlfriend’s 9-year-old son, who suffers from Asperger’s syndrome, to the ground when he tried to intervene, the complaint states.

Police have arrested the gunman who fatally shot a rival in Morris Heights earlier this year, authorities said.

Ivan Martinez was busted Saturday for killing Dayson Sumpter, 28, at West Burnside and Andrews avenues at around 8 p.m. May 24 after the two got into a fight.

Police have released surveillance video of the three men suspected in the shooting of a 9-year-old boy in East Tremont, authorities said.

The video shows the trio meandering down the street before one of the men pulls out a gun and fires at three men at East 175th Street and Prospect Avenue at around 3:45 p.m. Wednesday, authorities said.

One of the gunman’s bullets struck Michael Banner in the heel before the men fled in a white Chevy Impala, cops said.

The boy was released ­after treatment at a local hospital.

Queens

A perverted straphanger is wanted for groping a woman on the 7 train, authorities said yesterday.

The 21-year-old victim was standing as the train was pulling into the station at 74th Street and Roosevelt Avenue in Jackson Heights at around 4:30 p.m. Dec. 10 when the creep grabbed her butt, cops said.

The quick-thinking woman snapped the man’s picture (above) with her cellphone.